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Tiled MapGuide layers require different base assumptions for DPI and inches per unit in order to report the correct coordinates. The example is updated with a clear explanation of how to make these changes per-application. r=me (Closes #1511)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@7927 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Paul Spencer
2008-09-02 15:43:57 +00:00
parent 9d1bcce4e5
commit f8d3e41105
1 changed files with 20 additions and 3 deletions
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23
examples/mapguide.html
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@@ -21,14 +21,24 @@
<script type="text/javascript">
var map, layer;
var url = "http://demo01.dmsolutions.ca/mapguide/mapagent/mapagent.fcgi";
var url = "http://demo01.dmsolutions.ca/mapguide/mapagent/mapagent.fcgi?USERNAME=Anonymous&";
//you can use this URL when MapGuide OS is installed locally
//var url = "/mapguide/mapagent/mapagent.fcgi";
//Adjust the scale assumptions for MapGuide layers
//Tiled layers MUST use a DPI value of 96, untiled layers can use a
//different DPI value which will be passed to the server as a parameter.
//Tiled and untiled layers must adjust the OL INCHES_PER_UNIT values
//for any degree-based projections.
var metersPerUnit = 111319.4908; //value returned from mapguide
var inPerUnit = OpenLayers.INCHES_PER_UNIT.m * metersPerUnit;
OpenLayers.INCHES_PER_UNIT["dd"] = inPerUnit;
OpenLayers.INCHES_PER_UNIT["degrees"] = inPerUnit;
OpenLayers.DOTS_PER_INCH = 96;
//tiled version
function initTiled(){
OpenLayers.DOTS_PER_INCH = 96;
var extent = new OpenLayers.Bounds(-3631568.75,-1293815.5,4491139.5833333321,4937122);
var tempScales = [50000000,23207944.16806,10772173.45016,5000000,2320794.41681,1077217.34502,500000,232079.44168,107721.7345,50000];
var mapOptions = {
@@ -55,7 +65,6 @@
//un-tiled version
function initUntiled() {
OpenLayers.DOTS_PER_INCH = 96;
var extent = new OpenLayers.Bounds(-87.865114442365922,43.665065564837931,-87.595394059497067,43.823852564430069);
var mapOptions = {
maxExtent: extent,
@@ -97,6 +106,14 @@
var params = {
mapName: 'Sheboygan',
session: '0b8cb80e-0000-1000-8003-0017a4e6ff5d_en_C0A802AD0AFC0AFB0AFA',
mapName: 'Sheboygan',
session: '0b8cb80e-0000-1000-8003-0017a4e6ff5d_en_C0A802AD0AFC0AFB0AFA',
version: '2.0.0',
selectioncolor: '0xFF0000',
behavior: 7
};
layer = new OpenLayers.Layer.MapGuide( "MapGuide OS Overlay layer", url, params, options );
map.addLayer(layer);